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Sampling and testing – operational procedure: 1. Contract review, on-site exploration (if necessary), and contract signing. 2. Selection of samplers (at least 2 persons, who must be certified). 3. Development of a sampling plan (which requires review and approval). 4. Preparation of sampling equipment. 5. On-site sampling (observing the surroundings, recording time, location, and environmental conditions; then starting sampling, making records, sealing the samples, packing them, loading them onto a vehicle, and sending them to the laboratory). 6. Packaging, loading onto a vehicle, and sending to the laboratory. 7. Testing. 8. Submission of results report. 9. …… 2. Procedure documents related to sampling: Procedure documents need to be established for sampling. It is not necessary to establish such provisions if sampling is not involved; the details related to sampling can be specified in the work instructions. Sampling and sampling have the same English translation, but they convey **different meanings in our context. Generally, we consider sampling to be the act of collecting several samples from a large number of specimens or from a whole entity, such as river water sampling or soil sampling. Sampling involves selecting a portion from the collected samples to be used for testing. For example, if a customer sends 200g of soil for testing for heavy metal content, the laboratory will only take 0.5g for analysis. 3 What are the items for on-site sampling? Sampling tools, sample containers, stabilizers, spiked solutions, sample storage devices, sample labels, sampling record sheets, pens, environmental monitoring equipment, cameras, GPS trackers, electronic scales, emergency medical kits, personal protective equipment, means of transportation, fire extinguishers (if necessary), etc. 4 What quality control measures are required for sampling? Sampling and transportation blanks, on-site parallel samples, on-site spiked samples, code samples. Password sample: Two identical samples are taken, but with different numbers, to prevent testers from treating them differently. 5 Contents of original sampling records: Samples from different fields vary significantly. Generally, they include information such as sample name, sample number, sampling location/part, sampling time, sampling method, sample characteristics, quantity sampled, container used, storage requirements, sampler’s name, and environmental conditions. 6 Use label information; samples from different fields vary significantly, and typically include: sample name, number, sampling location, sampling time, and sampler. 7 Does sampling fall under detection in mobile locations? In the case of sampling and testing vehicles, they can be regarded as mobile locations. If it’s merely a portable detection device, it’s also difficult to define it as a mobile location. In short, on-site testing conducted by customers during sampling does not take place in a fixed location; it is essential to monitor and record the environmental conditions to ensure that the testing requirements are met. How to perform method validation for 8 sampling? Just practice a few times; necessary tools are required, and the tools as well as previous records will be checked. In some areas, sampling qualifications are not granted; the laboratory can carry out sampling and testing on its own, and can affix a label. In some areas, qualifications are granted only for sampling of testable items. The 91 samples include 10 individually packaged items. If one is selected for testing, does that count as sampling? Theoretically, it is considered sampling. Operation method: The entire sample has one identifier, for example ASDFG; then each sub-sample is ASDFG-01 up to -10. The laboratory may choose one of them for testing, the customer may specify one for testing, or several may be used together; this must be recorded accurately. 10 Verification of precision and accuracy in on-site sampling method validation: If the testing method does not involve sampling, then sampling is not taken into consideration. The testing standards are independent; the sampling portion can be evaluated separately. If the sampling procedure is described in detail in the test method, then the laboratory is not responsible for it and no verification is required. If the testing method provides detailed descriptions of sampling, and sampling and testing cannot be separated, then they must be verified together. 11 Precautions at the sampling site: 1. Smoking is prohibited. 2. Any unexpected situation must be reported. 3. Protective clothing must be worn; goggles should be used if necessary. 4. Protective clothing and work gloves are required. 5. One must know the location of the alarm system and fire-fighting equipment and be able to use them. 6. Do not eat or drink at sampling sites with harsh conditions. 7. Prevent contamination of the samples. 8. Seal the samples promptly to avoid loss of the substances to be analyzed. 9. Add fixatives correctly, etc. 10. Return the samples promptly to prevent sample degradation due to delays. 12 Minimum number of personnel for sampling: 2 people, who should assist each other and supervise one another, with safety in mind.